Production method for olefin-based polymer, olefin polymerization catalyst, and olefin-based polymer

Abstract

Provided is a production method for an olefin-based polymer, including polymerizing an olefin raw material using (A) a transition metal compound, (B) a boron compound capable of forming an ion pair with the component (A), (C) an organoaluminum compound, and (D) water, a molar ratio [(D)/(A)] of a molar quantity of the component (D) to a molar quantity of a transition metal in the component (A) being 5 or more and 10,000 or less.

The invention claimed is: 
     
       1. A production method for polypropylene, the production method comprising polymerizing propylene in the presence of the following components (A) to (D):
 (A) a transition metal compound; 
 (B) a boron compound capable of forming an ion pair with the component (A); 
 (C) an organoaluminum compound; and 
 (D) water, 
 wherein: 
 a molar ratio [(D)/(A)] of a molar quantity of the component (D) to a molar quantity of a transition metal in the component (A) is 5 or more and 10,000 or less; 
 a molar ratio [(D)/(C)] of the molar quantity of the component (D) to a molar quantity of an aluminum atom in the component C) is more than 0 and 0.9 or less; 
 the transition metal compound (A) is a double crosslinked metallocene complex represented by a formula (I): 
 
       
         
           
           
               
               
           
         
         M represents a metal element of Groups 3 to 10 of the periodic table or the lanthanoid series; 
         E 1  and E 2  each represent a ligand selected from a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclopentadienyl group, a substituted heterocyclopentadienyl group, an amide group, a phosphide group, a hydrocarbon group, and a silicon-containing group, form a crosslinked structure via A 1  and A 2 , and may be identical to or different from each other; 
         X represents a σ-bonding ligand, and when a plurality of X's are present, the plurality of X's may be identical to or different from each other, and X may be crosslinked with any other X, E 1 , E 2 , or Y; 
         Y represents a Lewis base, and when a plurality of Y's are present, the plurality of Y's may be identical to or different from each other, and Y may be crosslinked with any other Y, E 1 , E 2 , or X; 
         A 1  and A 2  each represent a divalent crosslinking group for bonding two ligands, and each represent a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a germanium-containing group, a tin-containing group, —O—, —CO—, —S—, —SO 2 —, —Se—, —NR 1 —, —PR 1 —, —P(O)R 1 —, —BR 1 —, or —AlR 1 —, wherein R 1  represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, and may be identical to or different from each other; 
         q represents an integer of from 1 to 5 representing [(valence of M)-2]; and 
         r represents an integer of from 0 to 3. 
       
     
     
       2. The production method according to  claim 1 , wherein the propylene or a polymerization solvent comprises (N) a nonpolymerizable unsaturated hydrocarbon. 
     
     
       3. The production method according to  claim 2 , wherein the nonpolymerizable unsaturated hydrocarbon (N) comprises a disubstituted olefin, a trisubstituted olefin, or a tetrasubstituted olefin represented by the following general formula (i), or an alkyne represented by the following general formula (ii): 
       
         
           
           
               
               
           
         
         wherein: 
         in the general formula (i),
 R a  to R d  each independently represent hydrogen or a hydrocarbon group having 1 or more carbon atoms, provided that at least two or more selected from R a  to R d  each represent the hydrocarbon group having 1 or more carbon atoms; and 
 R e  and R f  each independently represent hydrogen or a hydrocarbon group having 1 or more carbon atoms. 
 
       
     
     
       4. The production method according to  claim 2 , wherein a molar ratio [(N)/(A)] of a molar quantity of the component (N) to a molar quantity of a transition metal in the component (A) is 500 or more. 
     
     
       5. The production method according to  claim 1 , wherein:
 the transition metal compound (A) is a double crosslinked metallocene complex represented by a formula (II): 
 
       
         
           
           
               
               
           
         
         M represents a metal element of Groups 3 to 10 of the periodic table or the lanthanoid series; 
         X 1  represents a σ-bonding ligand, and when a plurality of X 1 's are present, the plurality of X 1 's may be identical to or different from each other, and X 1  may be crosslinked with any other X 1  or Y 1 ; 
         Y 1  represents a Lewis base, and when a plurality of Y 1 's are present, the plurality of Y 1 's may be identical to or different from each other, and Y 1  may be crosslinked with any other Y 1  or X 1 ; 
         A 1  and A 2  each represent a divalent crosslinking group for bonding two ligands, and each represent a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a germanium-containing group, a tin-containing group, —O—, —CO—, —S—, —SO 2 —, —Se—, —NR 1 —, —PR 1 —, —P(O)R 1 —, —BR 1 —, or —AlR 1 —, wherein R 1  represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, and may be identical to or different from each other; 
         R 4  to R 9  each represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, or a hetero atom-containing group, and it is necessary that at least one of R 4  to R 9  not represent a hydrogen atom: 
         q represents an integer of from 1 to 5 representing [(valence of M)-2]; and 
         r represents an integer of from 0 to 3.